While trying to create a release burndown, we have recently discovered that all our issues were not assigned to a version. Now I have bulk changed the version for all issues, but in the burndown it looks like they have been added today, and the initial estimate has changed drastically, which is not the case.
Does anybody know how this can be changed, and the issues can be displayed as completed in the closed sprints (and not all on bulk today)?
Thanks in advance